Home Forums Reloading Big Game Rifles Converting a long magnum case into a short magnum

I am wondering if it is possible to use a full-length sizing die and convert a long magnum cartridge into a sort magnum. Specifically, I would like to know if I can produce Lazzeroni 7.82 Patriot cases (short action) out of Lazzeroni 8.72 Warbird cases (long action). The two cartridges are identical except that the Partiot is one inch shorter than the Warbird. I was thinking that it should be possible to push the shoulder down in successive steps (say, each time 0.25") to cover a long cartrige into a short one with identical body. Is this practical?



Warbird:



Patriot: